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This is “Appendix H: Periodic Table of Elements”, appendix 8 from the book Principles of General Chemistry
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i
Chapter 32
Appendix H: Periodic Table of Elements
Two systems for numbering periodic groups are shown: 1–18 is the system currently recommended by the
Inernational Union of Pure and Applied Chemistry (IUPAC); an older U.S. system, in which letters designate main
group elements (A) and transition elements (B), is given parentheses.
An atomic mass in brackets indicates the mass of the longest-lived isotope of an element having no stable isotopes.
Elements with atomic numbers 114 (ununquadium, 289 amu) and 116 (ununhexium, 293 amu) have been recognized
by the International Union of Pure and Applied Chemistry (IUPAC). The collaborating scientists from the Joint
Institute for Nuclear Research in Dubna, Russia, and Lawrence Livermore National Laboratory in California have
been invited to propose names for the new elements. See http://iupac.org/publications/pac/asap/PAC-REP-10-05-01
3005
Chapter 32 Appendix H: Periodic Table of Elements
List of Elements
Name
Symbol
Atomic Number
Atomic Mass
Actinium
Ac
89
[227]*
Aluminum
Al
13
26.9815386(8)
Americium
Am
95
[243]*
Antimony
Sb
51
121.760(1)
Argon
Ar
18
39.948(1)
Arsenic
As
33
74.92160(2)
Astatine
At
85
[210]*
Barium
Ba
56
137.327(7)
Berkelium
Bk
97
[247]*
Beryllium
Be
4
9.012182(3)
Bismuth
Bi
83
208.98040(1)
Bohrium
Bh
107
[267]*
Boron
B
5
10.811(7)
Bromine
Br
35
79.904(1)
Cadmium
Cd
48
112.411(8)
Calcium
Ca
20
40.078(4)
Californium
Cf
98
[251]*
Carbon
C
6
12.0107(8)
Cerium
Ce
58
140.116(1)
Cesium
Cs
55
132.9054519(2)
Chlorine
Cl
17
35.453(2)
Chromium
Cr
24
51.9961(6)
*Element has no stable isotope. A value enclosed in brackets, e.g. [209],
indicates the mass number of the longest-lived isotope of the element.
Three such elements (Th, Pa, and U), however, do have a characteristic
terrestrial isotopic composition, and an atomic mass is given for them.
An uncertainty in the last digit in the Atomic Mass column is shown by
the number in parentheses; e.g., 1.00794(7) indicates ±0.00007.
†Element 112 named shortly before the release of this text. Other
periodic tables in this version of the text may refer to it as Ununbium
(Uub).
3006
Chapter 32 Appendix H: Periodic Table of Elements
List of Elements
Name
Symbol
Atomic Number
Atomic Mass
Cobalt
Co
27
58.933195(5)
Copernicium†
Cn
112
[285]*
Copper
Cu
29
63.546(3)
Curium
Cm
96
[247]*
Darmstadtium
Ds
110
[281]*
Dubnium
Db
105
[268]*
Dysprosium
Dy
66
162.500(1)
Einsteinium
Es
99
[252]*
Erbium
Er
68
167.259(3)
Europium
Eu
63
151.964(1)
Fermium
Fm
100
[257]*
Fluorine
F
9
18.9984032(5)
Francium
Fr
87
[223]*
Gadolinium
Gd
64
157.25(3)
Gallium
Ga
31
69.723(1)
Germanium
Ge
32
72.64(1)
Gold
Au
79
196.966569(4)
Hafnium
Hf
72
178.49(2)
Hassium
Hs
108
[269]*
Helium
He
2
4.002602(2)
Holmium
Ho
67
164.93032(2)
Hydrogen
H
1
1.00794(7)
*Element has no stable isotope. A value enclosed in brackets, e.g. [209],
indicates the mass number of the longest-lived isotope of the element.
Three such elements (Th, Pa, and U), however, do have a characteristic
terrestrial isotopic composition, and an atomic mass is given for them.
An uncertainty in the last digit in the Atomic Mass column is shown by
the number in parentheses; e.g., 1.00794(7) indicates ±0.00007.
†Element 112 named shortly before the release of this text. Other
periodic tables in this version of the text may refer to it as Ununbium
(Uub).
3007
Chapter 32 Appendix H: Periodic Table of Elements
List of Elements
Name
Symbol
Atomic Number
Atomic Mass
Indium
In
49
114.818(3)
Iodine
I
53
126.90447(3)
Iridium
Ir
77
192.217(3)
Iron
Fe
26
55.845(2)
Krypton
Kr
36
83.798(2)
Lanthanum
La
57
138.90547(7)
Lawrencium
Lr
103
[262]*
Lead
Pb
82
207.2(1)
Lithium
Li
3
6.941(2)
Lutetium
Lu
71
174.967(1)
Magnesium
Mg
12
24.3050(6)
Manganese
Mn
25
54.938045(5)
Meitnerium
Mt
109
[276]*
Mendelevium
Md
101
[258]*
Mercury
Hg
80
200.59(2)
Molybdenum
Mo
42
95.94(2)
Neodymium
Nd
60
144.242(3)
Neon
Ne
10
20.1797(6)
Neptunium
Np
93
[237]*
Nickel
Ni
28
58.6934(2)
Niobium
Nb
41
92.90638(2)
Nitrogen
N
7
14.0067(2)
*Element has no stable isotope. A value enclosed in brackets, e.g. [209],
indicates the mass number of the longest-lived isotope of the element.
Three such elements (Th, Pa, and U), however, do have a characteristic
terrestrial isotopic composition, and an atomic mass is given for them.
An uncertainty in the last digit in the Atomic Mass column is shown by
the number in parentheses; e.g., 1.00794(7) indicates ±0.00007.
†Element 112 named shortly before the release of this text. Other
periodic tables in this version of the text may refer to it as Ununbium
(Uub).
3008
Chapter 32 Appendix H: Periodic Table of Elements
List of Elements
Name
Symbol
Atomic Number
Atomic Mass
Nobelium
No
102
[259]*
Osmium
Os
76
190.23(3)
Oxygen
O
8
15.9994(3)
Palladium
Pd
46
106.42(1)
Phosphorus
P
15
30.973762(2)
Platinum
Pt
78
195.084(9)
Plutonium
Pu
94
[244]*
Polonium
Po
84
[209]*
Potassium
K
19
39.0983(1)
Praseodymium
Pr
59
140.90765(2)
Promethium
Pm
61
[145]*
Protactinium
Pa
91
231.03588(2)*
Radium
Ra
88
[226]*
Radon
Rn
86
[222]*
Rhenium
Re
75
186.207(1)
Rhodium
Rh
45
102.90550(2)
Roentgenium
Rg
111
[280]*
Rubidium
Rb
37
85.4678(3)
Ruthenium
Ru
44
101.07(2)
Rutherfordium
Rf
104
[267]*
Samarium
Sm
62
150.36(2)
Scandium
Sc
21
44.955912(6)
*Element has no stable isotope. A value enclosed in brackets, e.g. [209],
indicates the mass number of the longest-lived isotope of the element.
Three such elements (Th, Pa, and U), however, do have a characteristic
terrestrial isotopic composition, and an atomic mass is given for them.
An uncertainty in the last digit in the Atomic Mass column is shown by
the number in parentheses; e.g., 1.00794(7) indicates ±0.00007.
†Element 112 named shortly before the release of this text. Other
periodic tables in this version of the text may refer to it as Ununbium
(Uub).
3009
Chapter 32 Appendix H: Periodic Table of Elements
List of Elements
Name
Symbol
Atomic Number
Atomic Mass
Seaborgium
Sg
106
[271]*
Selenium
Se
34
78.96(3)
Silicon
Si
14
28.0855(3)
Silver
Ag
47
107.8682(2)
Sodium
Na
11
22.98976928(2)
Strontium
Sr
38
87.62(1)
Sulfur
S
16
32.065(5)
Tantalum
Ta
73
180.94788(2)
Technetium
Tc
43
[98]*
Tellurium
Te
52
127.60(3)
Terbium
Tb
65
158.92535(2)
Thallium
Tl
81
204.3833(2)
Thorium
Th
90
232.03806(2)*
Thulium
Tm
69
168.93421(2)
Tin
Sn
50
118.710(7)
Titanium
Ti
22
47.867(1)
Tungsten
W
74
183.84(1)
Ununhexium
Uuh
116
[293]*
Ununpentium
Uup
115
[288]*
Ununquadium
Uuq
114
[289]*
Ununtrium
Uut
113
[284]*
Uranium
U
92
238.02891(3)*
*Element has no stable isotope. A value enclosed in brackets, e.g. [209],
indicates the mass number of the longest-lived isotope of the element.
Three such elements (Th, Pa, and U), however, do have a characteristic
terrestrial isotopic composition, and an atomic mass is given for them.
An uncertainty in the last digit in the Atomic Mass column is shown by
the number in parentheses; e.g., 1.00794(7) indicates ±0.00007.
†Element 112 named shortly before the release of this text. Other
periodic tables in this version of the text may refer to it as Ununbium
(Uub).
3010
Chapter 32 Appendix H: Periodic Table of Elements
List of Elements
Name
Symbol
Atomic Number
Atomic Mass
Vanadium
V
23
50.9415(1)
Xenon
Xe
54
131.293(6)
Ytterbium
Yb
70
173.04(3)
Yttrium
Y
39
88.90585(2)
Zinc
Zn
30
65.409(4)
Zirconium
Zr
40
91.224(2)
*Element has no stable isotope. A value enclosed in brackets, e.g. [209],
indicates the mass number of the longest-lived isotope of the element.
Three such elements (Th, Pa, and U), however, do have a characteristic
terrestrial isotopic composition, and an atomic mass is given for them.
An uncertainty in the last digit in the Atomic Mass column is shown by
the number in parentheses; e.g., 1.00794(7) indicates ±0.00007.
†Element 112 named shortly before the release of this text. Other
periodic tables in this version of the text may refer to it as Ununbium
(Uub).
Source of data: Atomic weights of the elements 2001 (IUPAC Technical
Report) as supplemented by the Table of Standard Atomic Weights
2005 (to be published in Pure and Applied Chemistry) on the IUPAC
web site, and “Nuclear Data Sheets for A-266-294” (to be published in
Nuclear Data Sheets) at http://www.nndc.bnl.gov/superheavy.pdf.
3011